Hádek (feminine: Hádková) is a Czech surname. It is a diminutive of the surname Had, derived from the Czech word had, which means 'snake'. Notable people with the surname include:
Jan Hádek (born 1945), Czech motorcycle speedway rider Kryštof Hádek (born 1982), Czech actor Matěj Hádek (born 1975), Czech actor Michael Hádek (born 1990), Czech motorcycle speedway rider
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